If you can read K&R and understand it all, that's pretty good, as K&R covers pretty much all of the language.
However, reading it and understanding it all are very different. You should probably take a few passes through K&R and do all the associated exercises to ensure you really know it.
Even after reading through all of that, you will spend more months learning pointers the hard way. Expect lots of seg faults. On the plus side though, you'll get really good at reading hex!
There are a few caveats that the language has that you'll find out as well. One that used to give me trouble is that all pointers are the same size (4 bytes on x86), regardless of what they point at. A char* is the same size as a void* and an int*.
